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Soil Resistivity Testing Equipment

No matter what you are looking for in soil resistivity testing equipment, Kellyco has a lot to offer. We have different options with different features, price points, and test equipment included. Soil resistivity is important to those who are involved in the geophysical industry, in addition to determining how much corrosion underground pipes have, and how to set up the best grounding systems. Kellyco offers soil resistivity testing equipment that complies with the National Bureau of Standards. If you need any help picking out resistance measurement equipment, we would be happy to help.

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What Is A Soil Resistivity Test?

Essentially, measuring resistivity of the soil is determining the conductivity of soil by measuring the soil conditions of a volume of soil. By far, the most common process is the Wenner four-point method. It is not worth going into the other processes, as they are just spin-offs of the Wenner. When these tests are conducted, the measurement usually comes out in ohm-meters and other resistance meter measurements.

Why Do We Test Soil Resistivity?

Soil resistance is highly important whenever electrical grounding is being designed. From the simplest of electrical system designs, to the most complex, determining resistance values plays a large role in determining the efficacy of the system. It is important to get an accurate picture of ground resistance, moisture content, and how this impacts the resistivity of the soil by using a test kit. One of the other important roles measuring soil resistance plays is helping to figure out where ore pockets are by using the resistance readings to make smart decisions. The final reason we test soil resistivity is to see how much corrosion is going on with underground pipes, so that professionals can prevent the further corrosion. As can be seen, it is vital to use a soil resistivity test kit to determine much important information.

If you are trying to decide which soil resistance test instrument is right for you, there are a few key factors you will want to keep in mind. The first, and often most important is what you need to use the test kit for. If you are looking for geophysical surveying equipment, consider the EZ Pro Resistivity Survey Meter. It provides everything you will need to get an accurate picture of what lies below the surface. If you are looking for a high-end, all-purpose resistivity tester, consider any of OKM’s products. Their ground scanning equipment is amazing, and often seems too good to be true. Each of these products comes with a carrying case, lead wires, ground rods, and many other needed items.

How Do You Test for Resistivity?

To utilize the Wenner 4-pin test set, you will place four test leads, or soil pins, into the ground. There are two probes that send an electrical current into the ground, and the two other probes will measure the Earth resistance present. As these are measured, the data logger will keep them stored for your calculations you will perform. It is important to repeat the test a few times for each spacing, as you don’t want any fluke measurements. It is also important to move the probes out into a growing perimeter in increments of roughly 10 feet.

How Do You Calculate Resistivity of Soil?

Now that you have taken all of the measurements from the test kit, you need to know how to calculate the true values. You will know the depth that you have your probes at, you know that pi is equal to 3.1416, and you will know the resistance once you read the test kit’s measurement. Simply multiply 2 (for the resistance equation) by pi, then multiply by your depth, and finally, multiply by the resistance value in ohms. This is how the Wenner method will give you your measurement in ohm-meters. This is the useful value that you will use for any of your soil resistivity needs.

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